Screw-driver.



No. '796,154'. V PATENTED AUGpl, 1905. v

R ,Ri SGHULZE. i

l SCREWDRIVER. v APPLICATION FILED MAY 16.1904.

l @Amd/QJ y IINITED sTATEsY PATENT oEEIoE.

REINHARD SCHULZE, 0E BALTIMORE, MARYLAND.

SCREW-DRIVER. I

Speciication of Letters Patent.

Patented Aug. 1, 19x15.

Application led May 16, 1904. Serial No. 208,069.

To all whom it may concern.-

vide a construction whereby the clamp device.

may be operated near the handle end of the driver, thereby enabling thedevice to be used in contracted spaces and places where the hand oftheoperator cannot be inserted.

With these and other objects in View the invention is illustrated in theaccompanying drawings, inv which Figure l illustrates a side elevationof my improved device. Fig. 2 illustrates a sectional elevation of thedriver andclamp device, the handle being omitted. Fig. 3' illustrates aside elevation of the driver. Fig. A illustrates a side elevation ofthetubular sleeve, and Fig. 5 is a sectional view through the end of thedriver on the line 5 5 of Fig. 3.

In the drawings, A designates a handle of any suitable construction, butin the present instance is of the removable type, in which the shank ofthe driver is inserted and secured by a suitable clamp device a.

The driver rod has' two diameters-the smaller handle end and the largeroperating end o', with a shoulder 52 intervening between the said twoends. The larger end o of the driver is providedwith the usual beveledend b3 for insertion into the slot of the ordinary screw. This largerend is also provided at opposite sides with parallel longitudinalgrooves o, which extend from the-beveled end 3 toward the shoulder Z22.A stationary collar 0l surrounds the larger end of the d riverandbridges or extends over the said grooves c.

A sleeve c surrounds the driver, and one end e of same has a largerinterior diameter than the other end c2, and thereby forms an interiorshoulder @3. The end e' of said sleeve fits over the larger end of thedriver, `while the other end e2 of said sleeve surrounds 'the smallerend Z) of said driver. The larger end of the sleeve is provided atVdiametrically opposite sides with cross-slotsf, whichv have positionover the longitudinal grooves c in the larger 'end of the driver.

-Ajspring-arm g is tted into each of the grooves c, and each of saidarms is provided atitsinner end withl an outturned hook g', which entersone of the cross-slots f in the end of the sleeve e. These hooks arekept in engagement with the slots f by the tendency of the metal tospring outwardly. The springarms g are each provided with an outercurved or hook end g2, which have positions at oppo'- site sides of thebeveled end b3 of the driver, and said arms are also provided betweentheir ends with a notch g3 for a purpose now toA be described. y

When in position within the grooves c, the arms are confined therein bypassing beneath the stationary collar or band d, and as the sleeve e ismoved longitudinally on the driver toward the handle the outer curvedends g2 of the -spring-arms will be contracted or drawn toward eachother, and when moved in the opposite direction, or away from thehandle, the arms g will slide beneath the stationary collar andgradually expand until the notch g3 registers or has position beneaththe collar, at which time they have been expanded as far as they can go.By providing the notch g3 the springearms have a greater expansion ormovement away from each other. f

The inner end of the sleeve e is provided with a series of longitudinalslots L, which clamps them about the end o of the driver and holds'thesleeve and spring-arms g in the adjusted position.

The operation is simple and as follows: The beveled end 63 of the driveris inserted in the slot of the sc rew and the collar z' is drawntowardthe handle, se asto contract the arms g v and clamp them about the headof the screw by drawing them beneath the stationary collar d. Thisoperation of contracting the arms g can be easily accomplished by onehand, as the collar a, which indirectly oper-A ates them, is near thehandle. The operation of putting the screw in place is as usual, andjust before it is driven entirely in place the arms g may be withdrawnto release the head.

The shoulder on the interior of the sleeve is arranged to contact withthe shoulder on the exterior of the driver, as seen in Fig. 2, and limitthe forward movement of the sleeve and spring-arms.

The construction herein shown enables the clamp ends of the spring-armsto be adjusted with respect to the point end of the driver in twodirections simultaneouslywthat is, laterally and longitudinally.

When about to withdraw a screw from a contracted place where the fingersof the hand cannot have access, the spring clamparms should first beretracted to expose the point end of the driver, then the screw shouldbe started or turned back until its head is re-.

lieved, then the spring clamp-arms should be moved forward and caused togrip the head, and, finally, the screw may be turned until whollyreleased and then lifted out by the clamp-arms.

Having thus fully described my invention, what l claim as new, anddesire to secure by Letters Patent, is-

l. The combination with a driver havinga plurality of longitudinalgrooves, of a stationary collar near the end of the driver and bridgingover said grooves; a spring-arm fitting into each of the grooves in saiddriver and held therein by said stationary collar; a sleeve movablelongitudinally on the driver and connected to said springarms, and aclamp moving with and surrounding said sleeve at its inner end to clampthe same to said driver.

Q. rl`he combination with a driver having a plurality of longitudinalgrooves, of a stationary collar near the end of the driver and bridgingover said grooves; a spring-arm in each of said grooves and held thereinby said stationary collar; a sleeve surrounding said driver andconnected at one end with the spring-arms in said grooves, said sleevealso having a plurality of spring-arms at its opposite end whichsurround the driver, and means for clamping said latter arms around thedriver.

3. The combination with a driver havinga plurality of longitudinalgrooves at one end` of a stationary collar surrounding the driver andbridging said grooves; a spring-arm in each of said grooves andextending beneath the stationary collar and having outturned hoolis attheir inner ends; a sleeve surrounding said driver and provided at itsouter end with a plurality of cross-slots which receive the hooks onsaid spring-arms and the inner end of said sleeve having a plurality ofspringarms which surround the driver, and a collar surrounding thespring-arms at the inner end of said sleeve and arranged to clamp thesame about the driver.

In testimony whereof l aiiix my signature in presence of two witnesses.

REINHARD SGl'lULZlC.

Witnesses:

FELIX R. SULLIVAN, G. FERDINAND VOG'r.

